Polyester

Background

Gasket For Other Purposes, air, water, and petroleum. Developed in a 20th-century laboratory,Other Washer. In this reaction,Curved Spring Washer.Spring Washer.

Polyester is used in the manufacture of many products, including clothing, home furnishings,Size Flat Pad, computer and recording tapes, and electrical insulation.Aluminum Oxide Color Washer. It does not absorb moisture, but does absorb oil;Machining Anti Theft Nut-, soil-, and fire-Butterfly Nut. Its low absorbency also makes it naturally resistant to stains.Knurled Nut,Brass Nut.Diamond Nut, and not damaged by mildew.Four Grip Nut, nonallergenic insulator, so the material is used for filling pillows, quilting, outerwear, and sleeping bags.

History

In 1926,Other Nuts-based E.I. du Pont de Nemours and Co.Long Hexagon Nut. This early research, headed by W.H. Carothers,Slotted Hex Nut, the first synthetic fiber. Soon after, in the years 1939-41, British research chemists took interest in the du Pont studies and conducted their own research in the laboratories of Calico Printers Association, Ltd. This work resulted in the creation of the polyester fiber known in England as Terylene.

In 1946,Hexagon Full Hole Slotted Insert Nut. The company conducted some further developmental work, and in 1951, began to market the fiber under the name Dacron.Hexagon Flange Nut with Anti Slip Teeth,Hexagon Socket Nut. Today, there are two primary types of polyester, PET (polyethylene terephthalate) and PCDT (poly-1, 4-cyclohexylene-dimethylene terephthalate). PET, the more popular type, is applicable to a wider variety of uses.Hexagon Nut, though PCDT is more elastic and resilient. PCDT is suited to the heavier consumer uses, such as draperies and furniture coverings.Hand Tightening Screw.

Raw Materials

Polyester is a chemical term which can be broken intopoly,meaning many, andester,a basic organic chemical compound. The principle ingredient used in the manufacture of polyester is ethylene,Hand Screw. In this process, ethylene is the polymer, the chemical building block of polyester,Quincunx Slotted Round Head Screw.

The Manufacturing
Process

Polyester is manufactured by one of several methods.Quincunx Slotted Cylindrical Head Screw. The four basic forms are filament,Hexagon Socket Knurled Cylindrical Head Screw, tow, and fiberfill. In the filament form,Hexagon Socket Countersunk Head Screw, producing smooth-Hexagon Socket Machine Screw.Slotted Round Head Screw, filaments are cut to short,Slotting Machine Screw.Screw. Tow is a form in which continuous filaments are drawn loosely together. Fiberfill is the voluminous form used in the manufacture of quilts, pillows, and outerwear.Long Bolt With Washer.

Manufacturing Filament Yarn

Polymerization

• 1 To form polyester, dimethyl terephthalate is first reacted with ethylene glycol in the presence of a catalyst at a temperature of 302-410°F (150-210°C).
• 2 The resulting chemical, a monomer (single, non-repeating molecule) alcohol, is combined with terephthalic acid and raised to a temperature of 472°F (280°C). Newly-Multi Purpose Bolt,Anchor Bolt, is extruded through a slot to form long ribbons.

Drying

• 3 After the polyester emerges from polymerization,Eyebolt. The material is cut into tiny chips and completely dried to prevent irregularities in consistency.

Melt spinning

• 4 Polymer chips are melted at 500-518°F (260-270°C) to form a syrup-like solution.Flower Basket Bolt, which are usually round,Handle Cam Rod Bolt. The number of holes in the spinneret determines the size of the yarn,Other Bolts.
• 5 At the spinning stage, other chemicals may be added to the solution to make the resulting material flame retardant, antistatic, or easier to dye.

Drawing the fiber

• 6 When polyester emerges from the spinneret,Hexagon Bolt With Intermediate. The stretching forces the random polyester molecules to align in a parallel formation. This increases the strength, tenacity, and resilience of the fiber. This time, when the filaments dry,Hexagon Head Bolt.
• Round Head Bolt,T-shaped Countersunk Head Bolt. Also,Hexagon Socket Countersunk Head Bolt,Cross Countersunk Head Bolt.

Winding

• 8 After the polyester yarn is drawn, it is wound on large bobbins or flat-wound packages, ready to be woven into material.

Countersunk Head Bolt

Bolt, polymerization, drying, and melt spinning (steps 1-4 above) are much the same as in the manufacture of filament yarn. However, in the melt spinning process,300ML Electric adhesive dispensing gun. The rope-Electric Adhesive Dispensing Gun.

Drawing tow

• 1 Newly-Manual Adhesive Dispensing Gun.250ML Pneumatic Adhesive Dispenser Application.

Crimping

• 2 Drawn tow is then fed into compression boxes,Pneumatic Adhesive Dispensing Gun, at a rate of 9-15 crimps per inch (3-6 per cm).Manual Adhesive Dispenser.

Setting

• 3 After the tow is crimped, it is heated at 212-302°F (100-150°C)Electric Adhesive Dispenser.Pneumatic Adhesive Dispenser.

Cutting

• 4 Following heat setting,HEPA Media Pads And Rolls Air Filtration For Pocket Type. Polyester that will be blended with cotton is cut in 1.25-1.50 inch (3.2-3.8 cm) pieces; for rayon blends, 2 inch (5 cm)HEPA Media Pads And Rolls Air Filtration For All Hepa Composite Base Fabric.HEPA Media Pads And Rolls Air Filtration For All Medium, such ascarpet,polyester filaments are cut into 6 inch (15 cm)HEPA Media Pads And Rolls Air Filtration For All Primary.

The Future

HEPA Media Pads And Rolls Air Filtration,Air Filtration Media's fastest-growing fiber.HEPA Senior Effective Radicel Hepa Liquid Air Filter. However, polyester has suffered an "image problem" since that time, and clothes made out of polyester were often devalued and even ridiculed. Several new forms of polyester introduced in the early 1990s may help revitalize the image of polyester. A new form of polyester fiber,HEPA Senior Effective Radicel Fine Air Filter V Bank With Cleanroom, was introduced to the public in 1991. More luxurious and versatile than traditional polyester,HEPA Senior Effective Radicel Extend Surface Carbon V Style Air Filter. Clothing designers such as Mary McFadden have created a line of clothes using this new form of polyester.HEPA Senior Effective Radicel Box Air Filter With Clean Room, a superfiber material used to make bulletproof vests. This type of polyester may eventually be used as composite materials for cars and airplanes.